It later broke that Johnson was mainly referring to Vin Diesel, whose decisions as a producer weren’t gelling with Johnson.
It’s entirely possible The Rock did not specifically bring up Vin Diesel, because if he thanked everyone in the movie then it would take like 20 posts to do so.
Some co-stars have stepped up diffuse the situation, such as Tyrese Gibson when he posted about his positive relationship with The Rock.
Johnson makes no mention of Vin Diesel, which could mean quite a few things.